Hi all, I have had four orphan wild duck eggs incubating and they are hatching! Three of the four have hatched just fine however there is a problem with the fourth egg, which was badly cracked since their nest was destroyed. Little Crackle has made a decent hole in his shell and is poking his beak out but hasn't zipped properly so can't get out. He has been like this for about 45 minutes, should I help him out or leave him a little bit longer? Help!